Muffler.



G. GORMAGK.

MUFFLER.

APPLICATION FILED mum. 1912.

1,040,628. Patented Oct. 8, 1912.

GEORGE CORMACK, OF PLANO, ILLINOIS, ASSIGNOR TO TNDEPENDENT HARVESTER;

COMPANY, OF PLANO, ILLINOIS, A CORPORACLION OF MAINE.

MUFFLER.

Spcificationlof Letters Patent.

Application filed February 2, 1912. Serial No. 675,057.

To all whom it may concern:

Beit known that I, GEORGE Common, a citizen of the United States,residing at Plano, in the county of Kendall and State of Illinois, haveinvented newand useful Improvements in Mufflers, of which the followingis a specification, reference being had to the accompanying drawings,forming a art thereof.

' he purpose of this invention is to pro vide an improved form.otmufiler for explosive engines which shall be effective in reducing thesound of the exhaust without causing material back pressure.

It consists of the features and elements described and shown in thedrawings as indicated. in the claims.

In the drawings Figure l is a medial section of a muffler embodying thisinvention, section being taken as indicated at line 1-1 on Fig. 2. Fig.2 represents in plan one section of the device, this View being obtainedby taking section at line 22 on Fig. 1. Fig. 3 is an enlarged detailsection taken at line 3-3 on Fig. 2. Fig. l is a partial end elevationof the device.

Themulller which is the subject of this invention is made up of aseriesof similar sections, A, preferably of cast metal, and, placed in a pileor tier as indicated in Fig. 1. Each section is provided with twoapertured bosses A through which may be assed securing bolts, B, forproperly holdmg the sections together. In addition to the series ofsections, A, there are provided a top section, C, and a bottom section,D, whichdifi'er slightly in form from the intermediatesections, A. Eachof the sections, A, consists, as may be noted by comparison of Figs. 1and 2, .of a boundary flange, A and a transversoweb 'or wall, A, whosefunction is to act as a battle late in breaking up and distributing the.orce of the exhaust gas. The space within the boundary flange, Awhichis. not traversed by the web, A, has the form of a circularopening, A, through which communication is afforded between the severalchambers formed by successive sections when assembled as in Fig. 1. Theassembling of the sections, as rnaybe noted from this figure,

is such as to bring the webs, A, of success1ve sections at oppositesides of the center line of the muffler, so as to render the passage-way formed by the openings, A", a

very circuitous one. The height of the,

flange, A is slightly less than the height of the bosses, A, whichextend a lit-.tlebelow the lower surface of the web, A Thus, when thesections, A, are assembled one-0n top of another there remains betweeneach pair of them a considerable crevice, A' To properly complete thesupport of one section upon another there is provided ateach end of thesection a downwardly extending lug, A, whose depth is equal to theexcess depth of the bosses, A with the section resting upon the bosses,A and the lugs, A, it will be seen that the crevice, A is divided intofour parts, which extend along the greater portion of the flange, A

Patented Oct. 8, 1912.

and through these crevices it. is expected that the exhaust gas willmake its escape. The total exhaust opening provided by the crevices, Ais sutlicient to prevent any substantial amount of backpressure, and thecircuitous passage 'formed for the gases by thearrangement of thebattle-plates, A", is relied upon to a large extent to break up theforce and noise of the exhaust.

The top and bottom sections, C and D,

will be understood to resemble in outline the intermediate sections, A,but the bottom section is formed with a complete transverse wall, D inplace of the partial wall, A of'the section, A. The top section hasbosses, C and lugs, G which correspond to the bosses and lugs of theintermediate sections, A; but this section has no bathe-- plat-e, beingformed instead with a top wall,

C and a central opening, C", designed for connection with the exhaustpipe of an engine. 1

. I claim 1. A mufller comprising a chamber having an inlet at one end,a series of battle-plates extending alternately from either side of thechamber, and outlet openings in the side walls between the positions ofsaid batlleplates.

2. 'A muffler comprising a chamber having an inlet at one end, a seriesof bathe-plates extending alternately from either side of the chamberand past the middle of its width, and outlet openings in the side wallsbetween the positions of said bathe-plates.

3. A muiller comprising a chamber made up of sections, including endsections and intermediate sections, each intermediate section comprisinga peripheral wall and. a

transverse Web extending over a portion of the area Within saidperipheral wall, one of the end sections having an inlet opening, theintermediate sections being slightly spaced apart from one another toform outlet openings between them and assembled with successive Webportions at opposite sides of the central axis of the mufller chamberand means securing the sections in place.

4. A muflier comprising a chamber made up of a series of sections,including endf sections and intermediate sections, said intermediatesections each comprising a peripheral Wall, a transverse Web extendingover a portion only of the arealvvithin said Wall,

enonen CORMACK.

Witnesses CHAS. A. Bocnnnus, HARRY M. J ONES.

